It is very important for us to protects and pay attention to the eyes vision. The vision testing chart is made from PVC material, this eye chart is safe, non-reflective and without pungent smell. Suitable for reading from long distance. Applicable to home, kids, school, and small hospitals. Features -Color: As shown. -Material: PVC. -Size: About75.00X25.00X0.20cm/29.48X9.82X0.08inch. -Note: detection distance is 5 meters; the suitable suspension height is 80cm from the ground. -It is an eye visual testing chart, used to measure eye vision, clear printing and handwriting. -Made of premium PVC material, excellent and useful, durable and practical to use. -Suitable for family, kindergartens, schools or small hospitals, great vision testing tool for you to use. -The eye chart is very easy and convenient to use, different kinds and patterns design, clear printing design. -Simple in structure, easy to use, wear-resistant and reliable, you can use it with confidence.Packing list4 x eye charts